Mercurial > projects > dwt2
view org.eclipse.core.commands/src/org/eclipse/core/commands/common/HandleObjectManager.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Sat, 14 Mar 2009 18:23:29 +0100 |
parents | |
children |
line wrap: on
line source
/******************************************************************************* * Copyright (c) 2005, 2006 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.core.commands.common.HandleObjectManager; import org.eclipse.core.commands.common.HandleObject; import org.eclipse.core.commands.common.EventManager; import java.lang.all; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.Map; import java.util.Set; /** * <p> * A manager of {@link HandleObject} instances. This has some common behaviour * which is shared between all such managers. * </p> * <p> * Clients may extend. * </p> * * @since 3.2 */ public abstract class HandleObjectManager : EventManager { /** * The set of handle objects that are defined. This value may be empty, but * it is never <code>null</code>. */ protected const Set definedHandleObjects; /** * The map of identifiers (<code>String</code>) to handle objects ( * <code>HandleObject</code>). This collection may be empty, but it is * never <code>null</code>. */ protected const Map handleObjectsById; public this(){ definedHandleObjects = new HashSet(); handleObjectsById = new HashMap(); } /** * Verifies that the identifier is valid. Exceptions will be thrown if the * identifier is invalid in some way. * * @param id * The identifier to validate; may be anything. */ protected final void checkId(String id) { if (id is null) { throw new NullPointerException( "A handle object may not have a null identifier"); //$NON-NLS-1$ } if (id.length < 1) { throw new IllegalArgumentException( "The handle object must not have a zero-length identifier"); //$NON-NLS-1$ } } /** * Returns the set of identifiers for those handle objects that are defined. * * @return The set of defined handle object identifiers; this value may be * empty, but it is never <code>null</code>. */ protected final HashSet getDefinedHandleObjectIds() { HashSet definedHandleObjectIds = new HashSet(definedHandleObjects .size()); Iterator handleObjectItr = definedHandleObjects.iterator(); while (handleObjectItr.hasNext()) { HandleObject handleObject = cast(HandleObject) handleObjectItr .next(); String id = handleObject.getId(); definedHandleObjectIds.add(id); } return definedHandleObjectIds; } }